Leslie Controls Steam Water Heater

LES Series Packaged, Steam-fired Water Heaters

MODELS: V6LES636 84, V8LES830 84, V10LES1030 83, V10LES1036 89, V12LES1236 89, V12LES1242 102, V14LES1442

The LES Series steam-fired water heater is a high quality system which provides an economical, high capacity output using steam or hot water as the heating medium. It handles a broad range of capacities and is ideal for most domestic and process hot water applications. The LES Series water heater is designed to fit in tight areas where space is at a premium and is narrow enough to fit through most doorways. Units are offered in vertical or horizontal designs. The LES Series water heater is a completely pre-piped system. All components are sized, mounted and piped prior to shipment and require only hot and cold water lines, connections of steam, condensate and electric. It has digital electronic temperature limit control with LCD readout and is field programmable. This safety system eliminates the possibility of overheating or getting live steam. By utilizing an adjustable electric thermostat, the system is designed to close the main control valve upon an over-temperature condition.


  • Compact Size
  • Flows to 330 GPM
  • Steam or HTHW as heating source SS tank
  • ± 5°F accuracy


Coil: Standard Copper
Optional Cupro-nickel,
Stainless Steel
Shell: 316 L SS
Piping: Copper
Circulating Pump: Bronze


Pressure Rating: 150 psig (10 bar) 316-L Stainless steel tanks
316-L Stainless steel threaded connections 2" (5 cm)
Foam insulation
20 Gauge steel jacket with hammer tone enamel paint
Structural steel base
A.S.M.E. relief valve pressure and temperature
Digital thermometer
Copper U-Bend heating coil, rolled into copper lined tube sheet
Integral bronze circulator
High temperature cutoff
Double safety solenoid system




Shell: 150 psi
Tubes: 150 psi


Flow range: 330 GPM


Double wall coils
Vacuum breaker
235 MAW pressure rating

Certifications, Standards, & Approvals

A.S.M.E. Code constructed National Board registered

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